Users can open and save documents more easily if the document type has a file extension and a file type ID.

如果文档类型有文件扩展名和文件类型ID，则用户可以更容易地打开和保存文档。

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Users can open and save documents more easily if the document type has a file extension and a file type ID.

如果文档类型有文件扩展名和文件类型ID，则用户可以更容易地打开和保存文档。

youdao